Journal of Nanophotonics最新文献_第2页

Tunable broadband terahertz absorber based on star-shaped ring graphene metasurface 基于星形环状石墨烯元表面的可调谐宽带太赫兹吸收器

IF 1.5 4区物理与天体物理

Journal of Nanophotonics Pub Date : 2024-05-01 DOI: 10.1117/1.jnp.18.026004

Omekulsum Damavandi Asli, Mohammad Yazdi, Behrad Rezaee Rezvan

{"title":"Tunable broadband terahertz absorber based on star-shaped ring graphene metasurface","authors":"Omekulsum Damavandi Asli, Mohammad Yazdi, Behrad Rezaee Rezvan","doi":"10.1117/1.jnp.18.026004","DOIUrl":"https://doi.org/10.1117/1.jnp.18.026004","url":null,"abstract":"We introduced a tunable terahertz broadband absorber with near-unity absorption based on a graphene metamaterial. A periodic array of star-shaped ring graphene resonators along with a silicon dioxide substrate backed with a ground plane forms the absorbing structure. The absorption rate of the ultimate optimal absorber is more than 90% in the 0.8 to 2.4 terahertz frequency range, which is equivalent to a relative bandwidth of 100% at a central frequency of 1.6 terahertz. It is shown that the proposed structure retains its absorption bandwidth with an absorption level of more than 75% up to a 60-deg elevation angle for different wave polarizations. In addition, by increasing the chemical potential of graphene in the proposed structure from 0.1 to 0.9 eV, the absorption rate of the structure can be tuned from 40% to nearly 100%. The effects of different geometrical parameters of the structure on the absorption rate of the structure are also investigated, and the absorption mechanism of the presented absorber is investigated by interference and impedance matching theories. Finally, the simulation results are compared with calculated analytical ones, where good agreement between the results is observed. The proposed absorber has potential application in terahertz frequencies such as cloaking, modulators, tunable filters, sensors, and imaging systems.","PeriodicalId":16449,"journal":{"name":"Journal of Nanophotonics","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140939320","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High efficient step graded Inx Ga1−x N/GaN superlattice solar cell 高效阶跃梯度 Inx Ga1-x N/GaN 超晶格太阳能电池

IF 1.5 4区物理与天体物理

Journal of Nanophotonics Pub Date : 2024-04-01 DOI: 10.1117/1.jnp.18.026002

Dickson Warepam, Khomdram Jolson Singh, Rudra Sankar Dhar

引用次数: 0

Linear and nonlinear optical properties of laser-dressed V-shaped gallium arsenide/gallium arsenide antimonide/gallium arsenide quantum wells with different dressing parameters: a theoretical modeling 具有不同修整参数的激光修整 V 型砷化镓/砷化镓锑/砷化镓量子阱的线性和非线性光学特性：理论建模

IF 1.5 4区物理与天体物理

Journal of Nanophotonics Pub Date : 2024-04-01 DOI: 10.1117/1.jnp.18.026001

Sara Maleki, Azadeh Haghighatzadeh, Amin Attarzadeh

{"title":"Linear and nonlinear optical properties of laser-dressed V-shaped gallium arsenide/gallium arsenide antimonide/gallium arsenide quantum wells with different dressing parameters: a theoretical modeling","authors":"Sara Maleki, Azadeh Haghighatzadeh, Amin Attarzadeh","doi":"10.1117/1.jnp.18.026001","DOIUrl":"https://doi.org/10.1117/1.jnp.18.026001","url":null,"abstract":"A single GaAs/GaAsSb/GaAs quantum well having a valence band profile was described in this study using the V-shaped potential. An external static electric field (E-field) and a high-frequency intense laser irradiation were utilized to examine the first-order linear and third-order nonlinear optical properties. The theoretical modeling was achieved using a compact-density matrix and iterative process in a two-level system framework. The position-dependent effective mass approximation was applied to solve the Schrödinger equation and evaluating the energy states and their corresponding wavefunctions for the two lowest bound states within the quantum well’s valence band with regards to a heavy hole. We extended the investigation of the single V-shaped potential by incorporating the effects of the E-field, the well’s half-width, and antimony (Sb) content on optical characteristics. The study on the combined effects of the intense laser field and the mentioned factors revealed that the peak positions and amplitudes of the linear and nonlinear optical characteristics were strongly influenced by variation in the laser strength. Specifically, we observed, that under higher laser dressing parameters, the application of the electric field played an important role. This occurred when the impact of the well’s half-width and Sb content became prominent at values of lower laser-dressing parameters. It is significant to note that our findings will have potential real-world applications in photonics, optoelectronics, and related areas.","PeriodicalId":16449,"journal":{"name":"Journal of Nanophotonics","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140571546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation of high quantum yield nitrogen and sulfur co-doped carbon dots for sensitive detection of Cu2+ 制备用于灵敏检测 Cu2+ 的高量子产率氮硫共掺杂碳点

IF 1.5 4区物理与天体物理

Journal of Nanophotonics Pub Date : 2024-03-01 DOI: 10.1117/1.jnp.18.016011

YingTe Wang, SiRong Cheng, RongRong Wu, YuanYuan Zhang, BoHan Wang

引用次数: 0

In-suit doping Ta element in HNbWO6 nanosheets for enhancing photocatalytic performance 在 HNbWO6 纳米片中掺入 Ta 元素以提高光催化性能

IF 1.5 4区物理与天体物理

Journal of Nanophotonics Pub Date : 2024-03-01 DOI: 10.1117/1.jnp.18.016009

Jichao Zhu, Hongbo Zhao, Lifang Hu, Jie He

{"title":"In-suit doping Ta element in HNbWO6 nanosheets for enhancing photocatalytic performance","authors":"Jichao Zhu, Hongbo Zhao, Lifang Hu, Jie He","doi":"10.1117/1.jnp.18.016009","DOIUrl":"https://doi.org/10.1117/1.jnp.18.016009","url":null,"abstract":"In this work, HNbxTa1-xWO6 (x=0, 0.3, 0.5, 1) nanosheets were successfully synthesized by an in-suit doping strategy at the molecular level and an exfoliation-restacking process. The crystal phase structures, surface morphologies, and chemical components of the obtained HNbxTa1-xWO6 nanosheets were systematically characterized by X-ray diffraction patterns, laser Raman spectroscopy, scanning electron microscopy, ultraviolet–visible diffuse reflectance spectroscopy and N2 adsorption-desorption measurements. The adsorption and photocatalytic degradation of RhB aqueous solution under dark and simulated sunlight irradiation were investigated, respectively. The adsorption results demonstrated that the large total pore volume and strong acidity are favorable for the adsorption of RhB, and the photocatalytic results showed that the introduction of Ta element greatly improved the photocatalytic activities of the as-prepared HNbxTa1-xWO6 nanosheets. Among the HNbxTa1-xWO6 nanosheets, HTaWO6 nanosheet has the highest photocatalytic activity for RhB degradation with a rate constant of 1.62×10−2 min−1. According to the photocatalytic result, it can be concluded that the use of in-suit doping to control the energy band structure is an effective method for designing efficient photocatalysts.","PeriodicalId":16449,"journal":{"name":"Journal of Nanophotonics","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140035780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Generation of all-optical Walsh–Hadamard code using silicon micro-ring resonator 利用硅微环谐振器生成全光沃尔什-哈达玛德码

IF 1.5 4区物理与天体物理

Journal of Nanophotonics Pub Date : 2024-03-01 DOI: 10.1117/1.jnp.18.016010

Manjur Hossain, Kalimuddin Mondal, Jayanta Kumar Rakshit, Surajit Mandal, Amit Kumar Goyal, Yehia Massoud

引用次数: 0

Multi-resonance coupled metal pattern metamaterial for selective thermal emission 用于选择性热发射的多共振耦合金属图案超材料

IF 1.5 4区物理与天体物理

Journal of Nanophotonics Pub Date : 2024-03-01 DOI: 10.1117/1.jnp.18.016012

Wei Li, Shenglan Wu, Chunhui Tian, Jiacheng Li, Shuang Liu, Genlin Wu

{"title":"Multi-resonance coupled metal pattern metamaterial for selective thermal emission","authors":"Wei Li, Shenglan Wu, Chunhui Tian, Jiacheng Li, Shuang Liu, Genlin Wu","doi":"10.1117/1.jnp.18.016012","DOIUrl":"https://doi.org/10.1117/1.jnp.18.016012","url":null,"abstract":"With the continuous improvement of detection technology, higher requirements are put forward for infrared camouflage. Conventional low-emissivity materials have serious thermal instability, which increases the risk of detection. There is an urgent need to investigate more efficient infrared stealth materials. We design a metamaterial selective broadband emitter that utilizes multi-resonance coupling of metal patterns for infrared stealth. The proposed design exhibits low emissivity in the infrared atmosphere windows (3 to 5 μm and 8 to 14 μm) for infrared suppression and high emissivity in the non-infrared atmosphere window (5 to 8 μm) for radiative cooling. We introduce a supplementary design for high-temperature environments to meet a broader application need. Moreover, the low angle-dependence of the metamaterial emitter enables it to maintain broadband absorption characteristics even under large-angle incidence. This proposed approach serves as an effective supplement to the design of metamaterial broadband emitters and holds great potential for applications in infrared stealth, radiative cooling, thermal detection, sensors, thermophotovoltaics, and various other fields.","PeriodicalId":16449,"journal":{"name":"Journal of Nanophotonics","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140314264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-Q-factor multiple Fano resonance for sensitive refractive index sensors based on all-dielectric metasurface 基于全介电元表面的灵敏折射率传感器的高 Q 因子多重法诺共振

IF 1.5 4区物理与天体物理

Journal of Nanophotonics Pub Date : 2024-02-01 DOI: 10.1117/1.jnp.18.016007

Zuxiong Liao, Yiping Huo, Tong Liu, Chen Zhao, Tao Zhang, Congmu Xu, Zhongyue Zhang

引用次数: 0

6H-SiC phoxonic microcavities with photonic and phononic bandgaps 具有光子和声子带隙的 6H-SiC 光子微腔

IF 1.5 4区物理与天体物理

Journal of Nanophotonics Pub Date : 2024-02-01 DOI: 10.1117/1.jnp.18.016006

Peiwen Gao, Jingzhi Wu, Yanhong Wang

引用次数: 0

Guided-mode resonance sensors with high sensitivity and asymmetric structures 具有高灵敏度和非对称结构的导模共振传感器

IF 1.5 4区物理与天体物理

Journal of Nanophotonics Pub Date : 2024-02-01 DOI: 10.1117/1.jnp.18.016005

Hikmat Mohammed Hasan AlAameri, Mehrdad Shokooh-Saremi

引用次数: 0